Stationary-shuttle sewing-machine



A. BRILL. StationaryShuttle Sewing Machine.

No. 232,932. Patented Oct. 5,1880.

- F] g. 2. O R I} 41159 st e Inventor.

V (4642M w/ZZ N. PETERS. PMom-umoGnAPMER, WASHINGTON. u C

lUiviTnn STATES PATENT Trice.

ANDREW BRILL, OF CINCINNATI, OHIO.

STATIONARY-SHUTTLE SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 232,932, dated October 5, 1880.

Application filed January 15, 1880.

To all whom it may concern:

Be it known that I, ANDREW BRILL, of Oincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in StationaryShnttle Sewing- Machines, of which the following is a specification.

The natui e of my invention relates to an improvement in what are known as lock-stitch sewing-machines; and it consists in so constructing the needle-bar that in making the stitch the needle will enter the cloth in the usual manner, pass down until the eye is below the point of the shuttle, return slightly to form the loop, then revolve through an angle sufficient to throw the loop around the point of the shuttle, and then return to its original position preparatory to making the next stitch.

The needle-bar I make cylindrical, and cause it to play vertically up and down in the usual guides in the arm of the machine. In the periphery of that portion of the bar which passes through the lower guide I cut a peculiarly-shaped guide, slot, or groove, into which projects a steel friction-roller revolving on a stud secured to the guide. The friction-roller stud, being fixed in position with the roller revolvin g freely thereon, compels the needlebar,

as it is driven up and down, to move in vertical straight lines, or to revolve quickly or slowly through greater or less angles as successive portions of the groove are brought in contact with the friction-roller. The groove in the needle-bar is straight upon one side of the dividingbridgc or switch, except near the top, where a sharp inclination of the groove is made to revolve the needle-bar, and consequently the needle, sufficiently to throw the loop around the point of the shuttle. The groove upon the opposite side of the dividing-bridge is straight for about one-half of the length, the remainder being an easy incline to revolve the needle-l ar back to its original position.

The shuttle is placed, as usual in this class of machines, in a vertical position in a socket under the needle-plate, with the point down and curved outwardly to form a hook, upon which the loop is thrown as the needle is revolved by the grooved needle-bar.

In the accompanying drawings, Figure l is an elevation of a portion of a sewing-machine head, showing the needle-bar in position and the manner in which it is driven. Fig. 2 is a detached view of shuttle socket or case, showing the shuttle in position and the needle forming the loop. Figs. 3 and 4 are views, in plan and elevation, of the lower guide and the friction roller. Fig. 5 is an elevation of the shuttle. the grooved needle-bar.

Similar letters of reference indicate corre sponding parts.

A is the usual betlpla e of a sewing-machine, with the arm 13 rising from the right side as you face the machine and extending horizow tally over the bed-plate to the left of the machine.

From the left end of the arm project two guides or bosses, O and 0, one vertically above the other, which are drilled for the reception of the needle-bar D. The needle-bar D is cylindrical in section, and, for the purpose of reducing the weight, is made of small diameter at the upper end, and ofgreater diameter where it passes through the guide or boss 0 to perinit the cutting in the iieriphery of the bar of the groove or continuous slot (1.

d is the switch which guides the successive portions of the groove or slot (1 into contact with the friction-roller E.

The groove (1 is cut a sufficient depth into the needle-bar to furnish a suitable bearingsurface for the friction-roller E.

The stud 0, upon which the friction -roller turns, is provided with a screw-shank, nut, and washer, and is fitted to the horizontal slot 0, to secure it to the guide C.

By shifting the screw-shank laterally the position of the friction-roller E with respect to the needlebar may be varied to regulate the extent of the rotary movement of said bar for the purposes of adjustment.

The groove in the needle-baris clearly shown in Figs. 6 and 7. As you view the bar from the front of the machine that portion of the groove to the left of the switch is perfectly vertical for nearly the entire length to guide the needle in its descent; but at the termination of the straight part of the groove an ab rupt curve to the right revolves the needlebar and needle through an angle of nearly Figs. 6 and 7 are enlarged views of one hundred and eighty degrees and throws the loop around the point of the shuttle. That portion of the groove which lies to the right of the switch is straight or vertical for about one-half of its length from the top to draw the loop over and off the shuttle, and the remainder of the groove is an easy incline to re volve the needle-bar back to-its original position when at the highest point of its travel and while the stitch is being completed.

The shuttle F, which contains the usual thread-bobbin and tension device, is made after the ordinary form, with a curved point,f, which is simply projected outwardly to form a hook, upon which the thread-loop is thrown. Fig. 2 shows clearly how the loop is thrown on the point of the shuttle.

G, Figs. 1 and 2, is the shuttle socket or case, firmly attached to the under side of the bed-plate A.

It will be seen that the shuttle simply remains passive in the socket or case, only partaking of so much motion as may be caused by the thread-loop in passing around it, the shuttle being so fitted to the socket that the thread will pass freely around it without coming in contact with the surfaces of the socket. The shuttleis placed in a vertical position in the socket, with the point nearly in line with the axis of the needle-bar. Thc'needle-plate, when in its seat on the bed-plate, prevents the shuttle from leaving the socket or case by the lifting action of the loop. The shuttle can be removed for the renewal of thread on the bobbin by simply taking off the needle-plate and grasping it (shuttle) by the upper end with the thumb and finger.

In adapting my improvement to the prevailin g lock-stitch sewing-machines no changes are required in the driving-gear, feed-motion, take-up, or tension.

It is obvious that a sewing-machine fnrnished with a needle-bar and shuttle such as I have shown and described will make a stitch or seam preciselylike the ordinary lock-stitch machine. While this construction not only cheapens the first cost by the reduced number of parts and extreme simplicity of the needle-bar, it also furnishes a much lighter running lock-stitch machine than any heretofore invented.

I am aware thatlock-stitch sewing-machines containing a passive or stationary shuttle are not new, and that I am not the first to produce a machine wherein the thread-loop is thrown around the point of a stationary shuttle by the manipulation of the needle-bar, such machines being old and well known, the gist of my invention consisting in the devices D, d, d, E, and e, in combination with other parts of the machine, whereby the needle-bar is operated.

Having described my invention, what I claim neck B, guides O O, needle-bar D, having cut in the periphery thereof the groove (1, and switch d, in combination with a friction-roller, E, and stud 0, located in the slot 0, in the guide 0, and capable of adjustment therein to regulate the oscillation of the needle-bar, substantially as described.

In testimony whereof I have hereunto set my hand this 10th day of January, 1880.

' ANDREW BRILL. Witnesses WM. H. PUGH, COLLIN FORD, Jr. 

